How Do You Know Alternator Is Overcharging 2001 Jgc 4.7

Hi Guys

A quick update on what I have managed to practise so far.

I connected an ELM OBD device and installed "Car Browse" on my phone to log the OBD volts. Unfortunately the app does non export information merely does plot the data on a graph. The graph seems to indicate the the OBD voltage ranges between 14.5V and 15.2V, constantly fluctuating. While jotter however the reading on a multi-meter is between 14.4V and xiv.5V.

I am not sure if OBD volts is what I should be looking at and if I should have used a different app. I practise call up that I should rather connect a Volt meter in the cabin of the vehicle to become a more accurate reading.

Interestingly, when I measured the voltage on the bombardment before starting the vehicle, the reading was 12.3V. We do not bulldoze the Jeep daily but at least once a calendar week.

I wonder if I should non just get it to an auto electrician to check the alternator before the Dec holiday. Who would you recommend in the Edenvale vicinity?

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xiv.4v sound about right.

How oftentimes do y'all see 15.2v?

Quote Originally Posted by DC Polokwane View Post

I volition try a different app and besides start looking for an auto electrician.

According to the graph the accuse charge per unit hits fifteen.2v to often.

I fastened a screen shot. Name: Screenshot_20181121-140627.jpg Views: 249 Size: 15.4 KB

Use a multimeter and ask someone to rev the car to 3000rpm.

Check the voltage. If more than than 14.4 volts you volition overcharge the bombardment.

I suspect your alternator's voltage regulator is faulty.

14.4v is already at the higher end of the spectrum but acceptable. That constant +15v non right.

04:52 PM

Quote Originally Posted by MariusFourie View Post

Use a multimeter and ask someone to rev the automobile to 3000rpm.

Check the voltage. If more than than 14.4 volts you lot will overcharge the battery.

I doubtable your alternator's voltage regulator is faulty.

Fortunately I got home early today and did as yous said. The car did go out for a brusque drive early this morning time and I took the following readings now at the bombardment using a multi-meter:

Engine off: 12.67V
At idle within 10 seconds later on starting: fourteen.2V
At idle threescore seconds after: 14.3V
At 3 000 RPM: 14.33V

Quote Originally Posted by rudyb View Post

Fortunately I got home early today and did as y'all said. The motorcar did exit for a short drive early this forenoon and I took the following readings now at the battery using a multi-meter:

Engine off: 12.67V
At idle within 10 seconds subsequently starting: 14.2V
At idle 60 seconds later: fourteen.3V
At iii 000 RPM: fourteen.33V

I however recollect its a bit high and your regulator is non happy.

I made a booking on Saturday morning time for an machine electrician to examination the alternator. I will keep you posted on their findings.

Quote Originally Posted past rudyb View Post

I made a booking on Saturday forenoon for an auto electrician to test the alternator. I will go along you posted on their findings.

If it's not a lot of endeavour to pull the alternator or access is good, then change the regulator anyway. They are cheap equally chips and many includes a fresh brush set.

For years my 200 tdi defender was over- charging. Had a madman with volt meter, and at driving revs information technology would go upwardly to 15.8. I and so started driving with the headlights on, bringing the voltage to a more reasonable 14,4v.
I replaced the regulator brush set twice with Lucas components from Midas, with no modify.
My father in constabulary the told me to find a Bosch regulator castor set, which I got from diesel electric. Problem solved...

Quote Originally Posted by MariusFourie View Post

If it's non a lot of attempt to pull the alternator or access is practiced, and then change the regulator anyhow. They are inexpensive equally chips and many includes a fresh castor set.

+1

Morning Guys.

I took the Jeep to an auto electrician yesterday who performed a diagnostic test on the alternator. I am non sure what equipment they used but they tested information technology when the engine was cold, warm and while driving around. They took readings with no accessories running and and so with all the lights, aircon etc running.

They concluded that there is zippo incorrect with the alternator. They said it charges between 14.52 and xiv.58v at idle, hot and under load.

I did doubtable that the readings I got off the obd was non alternator every bit I did not become such high readings when I continued the multimeter.

I tin simply conclude that the Dixon battery was in fact faulty and they tried to pull a fast one on me by reporting that the alternator was overcharging the bombardment. I still accept the old battery in the garage which was cleaned after the Dixon lab did their testing merely now has signs of battery acid still leaking from the top. What is really foreign is that it has not been connected to a charger, it has been shunned to the corner and been there since I got it dorsum.

I volition proceed to continue an eye on things in the Jeep and maybe fifty-fifty fit a monitor displaying the battery voltage while driving.

Quote Originally Posted by rudyb View Post

Morning time Guys.

I took the Jeep to an auto electrician yesterday who performed a diagnostic test on the alternator. I am not sure what equipment they used but they tested it when the engine was cold, warm and while driving around. They took readings with no accessories running and then with all the lights, aircon etc running.

They concluded that there is nil incorrect with the alternator. They said it charges between 14.52 and 14.58v at idle, hot and under load.

I did suspect that the readings I got off the obd was not alternator as I did not get such high readings when I continued the multimeter.

I can just conclude that the Dixon battery was in fact faulty and they tried to play a joke on me by reporting that the alternator was overcharging the battery. I still have the onetime bombardment in the garage which was cleaned afterwards the Dixon lab did their testing merely now has signs of battery acrid still leaking from the tiptop. What is really strange is that it has not been connected to a charger, it has been shunned to the corner and been there since I got it back.

I will continue to keep an eye on things in the Jeep and mayhap even fit a monitor displaying the battery voltage while driving.

Accept the report to dixon. Make them pay for damages.

09:38 AM

Quote Originally Posted by MariusFourie View Post

Take the report to dixon. Make them pay for amercement.

I'chiliad confused. In posts number 24 and 27 you say xiv.3 - 14.4 V is high and will damage the battery. You lot recommend replacing regulator and/alternator.

Now the system is professionally tested to be at nearly 15V and you lot arraign the battery.

Unless y'all accept some way of seriously discharging a battery between xiv.6 Five charges you will destroy the battery.

———————

Battery acrid on top is highly consistent with over charging. The only style it can get in that location is spilling or overcharging. Even later on cleaning and not in apply, unless it was really deep cleaned with a strong alkali.

Withal, information technology's a lot more than complicated than that, with quite a few other reasons.

Quote Originally Posted by Fluffy View Post

I�grand confused. In posts number 24 and 27 you say 14.three - 14.four V is high and will damage the bombardment. You recommend replacing regulator and/alternator.

Now the system is professionally tested to exist at near 15V and you blame the battery.

Unless yous accept some mode of seriously discharging a bombardment between 14.6 5 charges yous will destroy the battery.

��

All the same, information technology�s a lot more complicated than that, with quite a few other reasons.

Im non a professional. I wont be happy with more than 14.3 volts merely if the pros have cleared the system....

Y'all have ameliorate understanding on such matters. What would your advice be, given the info presented?

Quote Originally Posted by MariusFourie View Post

Im not a professional. I wont be happy with more than 14.iii volts but if the pros accept cleared the system....

Yous have amend understanding on such matters. What would your advice exist, given the info presented?

Observe out from Dixon if they are happy with a constant charge voltage of 14.half dozen Five

All the bear witness is in that location for overcharging, also worrying is that you said the bombardment is at 12.3v before starting.

If y'all are merely using the vehicle weekly then you lot may accept a electric current drain that will need to be looked at. I would recommend charging the battery with a battery charger and and then test from at that place. The battery will not give you total life at those voltages. Look at an automobile charger.

I would condone the obd readings completely and utilise a multimeter or voltmeter for an accurate reading.

14.58v is way besides high for charging. On startup that value or higher is acceptable but after a few minutes of driving information technology must throttle back and reduce the voltage down, usually to fourteen.2v. That'due south why it is called a regulator - no insult intended simply explaining.

I would suggest checking the sense feedback wire if fitted as that will tell the regulator how much to charge. You may have high resistance or corrosion in the charging circuit which is disruptive the regulator, so it is charging more.

I would remove the alternator and bench test it to make 100 percent sure. For interest sake what is the voltage on the overcharged Dixon battery.

I checked on my Mad Human this morning time and it goes to a max of 14v. The National Luna monitor goes up to xiv,2v.

But I trust the Mad Man, over that National Luna.

11:57 AM

My 2c

I accept used and still have a number of Dixon Batteries...

The 88Ah referred to in this thread is a conventional 658 Sealed Maintenance Gratuitous Lead Acrid battery.

Now, that grouping of batteries (simply about all makes) are supposed to be charged at max 14.2-14.4 Volts until full and then maintained at thirteen.6-13.eight Volts - take note that is at 25 deg C.

Charging those batteries at 14.6 V in a hot engine bay for extended flow will cause excessive gassing and tedious loss of water from the electrolyte.
Now, with a and so called sealed battery the user never tops upwardly the battery h2o.......
The electrolyte level goes down, eventually exposing the elevation of plates. This is when the bad happenings get-go.
More gassing more loss more fierce gassing - read leaking!

Me say it's not the battery....it'southward a bad alternator regulator.

I don�t believe in Sealed Maintenance Costless Pb Acrid batteries.

Non in Africa in a 4x4 or offroad trailer.

Tear the sticker on height of the battery off, unscrew caps and fill up to level.

How Do You Know Alternator Is Overcharging 2001 Jgc 4.7

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